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With four sizes from S to XL, the Trek Powerfly+ 4 Gen 5 adapts its wheels and fork to the rider: 27.5 inch wheels and 100 mm of travel in S, 29 inch and 120 mm above that. It comes with a Bosch Performance Line CX motor and a 600 Wh PowerTube, and weighs 23.10 kg in size M according to Trek. The Gloss Radioactive Red/Matte Dark Star finish contrasts a bright gloss red with a matt black.
| Frame | Alpha Platinum aluminium, removable integrated RIB 2.0 battery, Motor Armor motor protection, Control Freak internal routing, tapered head tube, Boost148 12 mm axle |
| Motor | Bosch Performance Line CX, Bosch smart system; assist cuts out at 25 km/h in Europe |
| Battery | Bosch PowerTube 600 Wh, integrated in the down tube and removable |
| Controls / display | Bosch Purion 200 on the bar |
| Fork | SR Suntour XCR 34, air spring, 2CR damper, hydraulic lockout, Boost110 15 mm axle, 100 mm in S, 120 mm from M to XL |
| Drivetrain | Shimano CUES 1x10 Linkglide: U6000 GS derailleur, FSA Bosch 36T 165 mm chainset, LG300 11-48 cassette, LG500 chain |
| Brakes | Disc, Tektro Centerlock 203 mm rotors |
| Wheels / tyres | Bontrager Connection double-wall rims, Shimano TC500 hubs / Bontrager XT3 Comp 2.40 in (27.5 in S, 29 above) |
| Cockpit | Bontrager Comp alloy 780 mm handlebar, 40 mm rise, Bontrager Comp 50 mm stem, Blendr compatible |
| Saddle / seatpost | Bontrager Commuter Comp / Bontrager alloy 31.6 mm seatpost, 330 to 400 mm depending on size |
| Weight | 23.10 kg in size M (Trek figure) |
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At a glance
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For a couple or family who want to ride together despite different heights and levels: size S fits from 155 cm, XL up to 195 cm. It is also aimed at anyone who wants to ride for longer without dreading the hills.
Alpha Platinum aluminium, the foundation of the Powerfly+. Trek groups its alloys under the Alpha name, and Platinum is one of the top grades in the family, just below the Alpha NEXT Platinum of the Fuel models. On this Powerfly+ 4, it forms a hardtail frame that houses the battery in the down tube, protects the motor under a Motor Armor skid plate and routes the cables internally.
| Alpha Platinum (Powerfly+) | Alpha Gold (Marlin+) | OCLV Mountain carbon (Rail+ 9.7 / 9.8) | |
| Level | Top grade of Trek aluminium | Aluminium of the entry-level e-MTB | Trek mountain bike carbon |
| Construction | Shaped tubes, battery housed in the down tube | Shaped tubes, compact battery | Layers compacted under heat, impact-resistant lay-up |
| Reference bike | Powerfly+ 4, 23.10 kg (M) | Marlin+ 8, 21.89 kg (M) | Rail+ 9.7 / 9.8 full-suspension |
| What it means | Tough, takes a big battery | Lighter, less powerful motor | Reserved for high-end full-suspension bikes |
Put simply: the Powerfly+ 4 gives you the most powerful Bosch motor in the hardtail range with a 600 Wh battery and deliberately simple mechanics. It is the lightest version of the Powerfly+ 4, at 23.10 kg in M.
The SR Suntour XCR 34 fork uses an air spring: you set its firmness with a pump according to the rider's weight, so a light rider and a heavy rider alike can get the right sag. The 2CR damping and hydraulic lockout round things off for tarmac climbs.
A small size on 27.5 inch wheels lowers the centre of gravity and makes low-speed manoeuvres easier, which is invaluable when you are new to a bike of more than 20 kg. The larger sizes on 29 inch wheels roll more easily over the roots and steps on the trails of the Montagne Noire.
| Model | Motor / battery | Suspension (M) | Drivetrain | Weight (M) |
| Marlin+ 8 | Bosch Active Line Plus / 400 Wh | 120 mm fork | Shimano Deore 12-speed | 21.89 kg |
| Powerfly+ 4 | Bosch CX / 600 Wh | 120 mm fork (100 in S) | Shimano CUES 10-speed | 23.10 kg |
| Powerfly+ 4 800 Wh (XCM fork) | Bosch CX / 800 Wh | 120 mm fork | Shimano CUES 10-speed | 24.90 kg |
| Powerfly+ 6 (TranzX post, Kovee rims) | Bosch CX / 800 Wh | 120 mm fork (100 in S) | Shimano 12-speed | 24.10 kg |
Our take: the three Powerfly+ 4 colourways share the XCR fork and 600 Wh battery; only the black one changes tyres. If your budget allows, the Powerfly+ 6 adds a dropper post and 800 Wh for 24.10 kg.
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LVR sizing advice If you are between sizes, the smaller one makes the bike easier to handle when stationary and in hairpins, the larger one more settled on fast tracks. Size S rolls on 27.5 inch wheels with a 100 mm fork; from M to XL, 29 inch wheels and 120 mm.
Source: Trek size guide. Bike fitting available in our Béziers shop. |
| Which size for 1.60 m? | S covers 155 to 165 cm according to Trek; we confirm it with your inseam in store. |
| How do I set up the fork? | With a shock pump, according to your weight; we do the first set-up with you. |
| What assist modes are there? | They are selected from the Bosch Purion 200 controller on the bar. |
| Is the red matt? | No, the red is gloss and contrasts with a matt black. |
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The LVR Cycles verdict The Powerfly+ 4 that adapts to every rider, with an adjustable air fork and wheels chosen according to size. Its bright red on matt black gives it a dynamic look.
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Why buy from LVR Cycles? In Béziers, we help you choose the size, set up the fork for your weight and support you on your first rides with our local route advice.
Please note that the specifications may be changed without prior notice by the manufacturer, based on the availability of components and other factors.
Data sheet
Specific References